No. 537] HAIR FORM AMONG FILIPINOS 533 



may suppose that the gametic composition of the wavy 

 hair is that of the intermediate form between curly and 

 straight, a heterozygote, cs, and that half of the straight 

 hair is simplex, Sc, and half is duplex, SS. The result of 

 mating curly and straight hair would he offspring in the 

 proportion and with the gametic composition of 2SS- 

 straight hair, lec-curly hair, Ics-wavy hair, and this pro- 

 portion is approximately the truth. There are in Table 

 V :>1 children with straight hair. 20 curly-haired, and 28 

 wavy-haired children. 



Only three families occur with a cross of curly and 

 wavy hair. Therefore no conclusions may be safely 

 drawn from them. The curly hair does appear to be 

 dominant in these families, and the straight hair reces- 

 sive, however, because there are 11 curly-haired children, 

 3 straight-haired, and 1 child with wavy hair. 



The two Negrito families where kinky, or woolly, hair 

 is crossed with straight, have four children with curly 

 hair in the family where one grandmother probably had 

 curly hair, and four children with wavy hair where no 



a cross of straight and woolly hair the hair-form blends 

 in the first generation. Curly and wavy hair appears 

 wherever the Negrito and the Malay have been in contact 

 for any length of time in the Philippine Islands, and espe- 

 cially among those who are called Negritos, as the Bataks 

 of Palawan, the Negritos in Mindoro, Panay, Zambales, 

 Cagayan and among the Ilongots. Inferences from the 



families where the ancestry* has a predominance of 

 straight hair. Therefore, the inverse of this should be 

 true, namely, that woolly hair should predominate where 

 the ancestry shows a predominance of woolly hair. This 



